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Search Results: 1 - 10 of 199411 matches for " Jenny Dussan Garzón "
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TRIAL EVALUATION OF TOXICITY AND PATHOLOGY IN MURINE TISSUES USING BACILLUS SPHAERICUS COLOMBIAN STRAIN
Rivera-Rodríguez,Silvia C.; Dussan-Garzón,jenny;
Actualidades Biológicas , 2008,
Abstract: colombian isolate bacillus sphaericus ot4b25 was tested for toxicity and pathology on rabbits and mice as mammalian models. after a high single dose of microorganism (108-109 spores/ml) in four different tests that included dermal, inhalatory, oral, and intraperitoneal routes of administration, subsequent daily observations were performed and weekly body weight was measured. in the oral and intraperitoneal routes infectivity was evaluated by a gross necropsy at interim or final sacrifice, recovering the microorganism both from organs and from peripheral blood. in the oral test, clearance of microorganism was estimated in feces and in the inhalatory test it was estimated from lungs. in both tests a decrease of the recovered microorganism was observed in time. even though in the oral test recovery of the microorganism from the liver, spleen and lungs and additionally in the intraperitoneal from caecum and injection site was observed, it was not recovered from blood and brain in both tests. although a persistence of the microorganism in animals was observed after oral, inhalatory and intraperitoneal routes of administration, no animals died or showed lesions during each test, and the body weight was not affected compared with the control groups. in conclusion, at the conditions and doses tested bacillus sphaericus ot4b25 is not toxic or pathogenic following dermal, oral, inhalatory, and intraperitoneal routes of administration.
TRIAL EVALUATION OF TOXICITY AND PATHOLOGY IN MURINE TISSUES USING BACILLUS SPHAERICUS COLOMBIAN STRAIN EVALUACIóN PRELIMINAR DE LA TOXICIDAD Y PATOLOGíA DE LA CEPA COLOMBIANA BACILLUS SPHAERICUS EN TEJIDOS DE RATóN
Silvia C. Rivera-Rodríguez,jenny Dussan-Garzón
Actualidades Biológicas , 2008,
Abstract: Colombian isolate Bacillus sphaericus OT4b25 was tested for toxicity and pathology on rabbits and mice as mammalian models. After a high single dose of microorganism (10(8)-10(9) spores/ml) in four different tests that included dermal, inhalatory, oral, and intraperitoneal routes of administration, subsequent daily observations were performed and weekly body weight was measured. In the oral and intraperitoneal routes infectivity was evaluated by a gross necropsy at interim or final sacrifice, recovering the microorganism both from organs and from peripheral blood. In the oral test, clearance of microorganism was estimated in feces and in the inhalatory test it was estimated from lungs. In both tests a decrease of the recovered microorganism was observed in time. Even though in the oral test recovery of the microorganism from the liver, spleen and lungs and additionally in the intraperitoneal from caecum and injection site was observed, it was not recovered from blood and brain in both tests. Although a persistence of the microorganism in animals was observed after oral, inhalatory and intraperitoneal routes of administration, no animals died or showed lesions during each test, and the body weight was not affected compared with the control groups. In conclusion, at the conditions and doses tested Bacillus sphaericus OT4b25 is not toxic or pathogenic following dermal, oral, inhalatory, and intraperitoneal routes of administration. La toxicidad y patogenicidad del aislamiento colombiano de Bacillus sphaericus OT4B25 fue probada en conejos y ratones como modelos mamíferos. Después de la administración de una sola dosis del microorganismo (10(8)10(9) esporas/ml) en cuatro diferentes pruebas que incluían rutas de administración dérmica, inhalatoria, oral e intraperitoneal, se realizó un seguimiento con observaciones diarias y la determinación del peso de los individuos semanalmente. En las dos últimas rutas de administración la infectividad fue evaluada a través de necropsias en sacrificios interinos intentando recuperar el microorganismo de órganos y sangre. En la prueba oral, se estimó la eliminación del microorganismo en heces y en la inhalatoria se hizo de los pulmones, en ambas se observó la disminución en los títulos del microorganismo recuperado a través del tiempo. aunque en la ruta de administración oral el microorganismo se recuperó principalmente del hígado, bazo y pulmones, adicionalmente a estos órganos del sitio de inyección y del ciego en la intraperitoneal, no se recuperó de sangre o cerebro en ambas pruebas. a pesar de la persistencia del mic
Aproximaciones Biológicas y Fisicoquímicas en el tratamiento de contaminantes: un resumen del aporte de la Universidad de los Andes
Jenny Dussan Garzón,Martha Josefina Vives-Florez,Víctor Manuel Sarria,Oscar Fernando Sánchez Medina
Revista de Ingeniería , 2009,
Abstract: Este resumen pretende dar una visión global de los aportes de la Universidad de los Andes en el tratamiento de aguas y suelos con la presencia de compuestos de difícil degradación o tiempo de vida media prolongado, tales como fármacos (Ciclofosfamida), lodos aceitosos y derivados de la industria del petróleo (Tolueno, Xileno, Fenol) derivados de la industria textil, química y pesticidas (Bisphenol A, AMBI, Glifosato, Isoproturon y Metobromuron), usando tecnologías ya sea basadas en procesos biológicos (biorremediación y bioadsorción) o de oxidación avanzada (foto-Fenton). /This summary intends to give a global view of the Universidad de los Andes contributions related to the water and soil treatment in the presence of recalcitrant or long half-life aquatic pollutants such as drugs (Cyclophosphamide), oil sludge and petroleum (Toluene, Xylene and Phenol), textile, chemical (Bisphenol A, AMBI) and pesticides (Glyphosate, Isoproturon, and Metobromuron) industry derived products based on biological (bioremediation and bioadsortion) and advanced oxidation (Photo-Fenton) approaches.
Caracterización fisiológica y genética de cepas nativas de Bacillus sphaericus Physiologic and genetic characterization of Bacillus sphaericus native strains
Dussen Garzón Jenny,Andrade Linares Diana Rocio,Lozano Ardila Lucía Cristina,Vanegas Moyano Sandra del Pilar
Revista Colombiana de Biotecnología , 2002,
Abstract: Se aislaron 18 cepas nativas de Bacillus sphaericus patógenas a larvas de mosquitos de diferentes regiones de Colombia. El objetivo de este estudio fue evaluar a nivel fisiol6gico y molecular cepas patógenas y compararlas con la de referencia 2362. Se evaluó el crecimiento celular, el porcentaje de esporulación, la patogenicidad en larvas de tercer instar de Culex ouinquejasciatus, la presencia de las proteínas toxigénicas, el tama o de plásmidos nativos y el polimorfismo genético entre aislamientos patógenos y no patógenos. Las cepas de Bs evaluadas presentaron una etapa de latencia de 2-3 h y una fase logarítmica de 7 h; la esporulación en BHI fue menor del 1% a las 40 h de incubación; en el medio NYSM se obtuvo diez veces más producción de biomasa y de esporas; e126% de la población mostró porcentajes de esporulación superiores al 90%; los aislamientos clasificaron en tres grupos de patogenicidad con [Fórmula] y [Fórmula] Se detectaron mutaciones puntuales en los genes que codifican para las toxinas nativas, y se ha1l6 una proteína de 30 kDa exclusiva de las cepas nativas patogénicas. Los aislamientos de Bs presentaron un plásmido de 118 Kb, no relacionado con la toxicidad; las cepas patógenas son un grupo homogéneo con una similitud entre el 90-100%, mientras que las no pat6genas son genéticamente heterogéneas y conforman un cluster aparte. Las cepas nativas tienen un gran potencial en control biológico de larvas de mosquitos transmisores de enfermedades, tales como dengue, malaria, encefalitis y filariasis, entre otras. Eighteen pathogenic native strains of Bacillus sphaericus that were pathogens to mosquito larvae were isolated from different Colombia regions. The objective of this study was to evaluate at physiological and molecular level pathogenic strains and to compare them with the reference 2362 one. Cellular growth, sporulation percentage, pathogenic activity against third instar larvae of Culex quinquejasciaius, the presence of toxigenic proteins, the size of native plasmids and the genetic polymorphism among pathogenic and non pathogenic isolations was evaluated. The evaluated strains of Bs presented a latency stage ranging from 2 to 3 h and one logarithmic phase of 7 h; the sporulation in BHI was lower than 1% to 40 h of incubation, in NYSM medium was obtained ten times more production of biomass and spores, 26% of the population showed sporulation percentage higher than 90%; the isolations were classified in three groups of pathogenicity with [Formula] and [Formula]. Punctual mutations on the genes which encoding for native toxins were
The Study on the Flow Generated by an Array of Four Flettner Rotors: Theory and Experiment  [PDF]
Fernando Garzón, Aldo Figueroa
Applied Mathematics (AM) , 2017, DOI: 10.4236/am.2017.812132
Abstract:
We present an immersed array of four rotors whose promoted flow can be mathematically modeled with a creeping flow solution from the incompressible Navier-Stokes equations. We show that this solution is indeed representative of the two-dimensional experiment and validate such class of solution with experimental data obtained through the Particle Image Velocimetry technique and time-lapsed particles visualizations.
Aproximaciones biológicas y fisicoquímicas en el tratamiento de contaminantes: un resumen del aporte de la Universidad de los Andes
Dussán Garzón,Jenny; Vives-Florez,Martha Josefina; Sarria,Víctor Manuel; Sánchez Medina,Oscar Fernando; Delgado,Luis Fernando; Hernández Sierra,Sebastián; González Barrios,Andrés Fernando;
Revista de Ingeniería , 2009,
Abstract: this summary intends to give a global view of the universidad de los andes contributions related to the water and soil treatment in the presence of recalcitrant or long half-life aquatic pollutants such as drugs (cyclophosphamide), oil sludge and petroleum (toluene, xylene and phenol), textile, chemical (bisphenol a, ambi) and pesticides (glyphosate, isoproturon, and metobromuron) industry derived products based on biological (bioremediation and bioadsortion) and advanced oxidation (photo-fenton) approaches.
John Gray “Misa negra. La religión apocalíptica y la muerte de la utopía”
Iván Garzón
Revista Enfoques : Ciencia Política y Administración Pública , 2010,
Abstract: Review of the book Misa negra. La religión apocalíptica y la muerte de la utopía written by John Gray
Multivariate Statistical Analysis of Phyllite Samples Based on Chemical (XRF) and Mineralogical Data by XRD  [PDF]
Eduardo Garzón Garzón, Antonio Ruíz-Conde, Pedro Jose Sánchez-Soto
American Journal of Analytical Chemistry (AJAC) , 2012, DOI: 10.4236/ajac.2012.35047
Abstract: It is presented the results obtained of a multivariate statistical analysis concerning the chemical and phase composition, as a characterization purpose, carried out with 52 rock phyllite samples selected from the provinces of Almería and Granada (SE Spain). Chemical analysis was performed by X-ray fluorescence (XRF). Crystalline phase analysis was performed by X-ray powder diffraction (XRD) and the mineralogical composition was then deduced. Quantification of weight loss (100? and 1000?C) was carried out by thermal analysis. The aims of this investigation were to analyze and compare the chemical and mineralogical composition of all these samples and to find similarities and differences between them to allow a classification. Several correlations between results of the characterization techniques have been also investigated. All the data have been processed using the multivariate statistical analysis method. The XRF macro-elements (10) and microelements (39) data generate one macrogroup with two new subgroups (1 and 2), and an isolated sample. In subgroup 1 of macroelements, a positive correlation was found between XRF results and geographic location characterized by lower MgO content, which is associated to its geological origins. When multivariate statistical analysis is applied to results obtained by XRD, two groups appear: the first one with a sample with zero percentage of iron oxide and the second one with the rest of the samples, which is classified in two groups. A correlation is observed between the alkaline content (XRF) and illite (XRD), CaO and MgO with dolomite and indirectly between the weight loss after heating at 1000?C and the contents of phase minerals that lose structural water (illite + chlorite) or carbon dioxide (dolomite). The present investigation has interest and implications for geochemistry and analytical chemistry concerning earth rocks and silicate raw materials.
Globalization, Latin American Migration and Catalan: Closing the Ring
Luis Garzón
Sustainability , 2012, DOI: 10.3390/su4102498
Abstract: This article examines the effects of globalization dynamics on the use of Catalan among Latin American migrants living in Catalonia. The globalization process pushes towards an increasing mobility of workers and companies. Barcelona is one of the cities where this dynamic has been more evident in the last two decades, with big areas of the city being reshaped in order to suit the needs of global capital. At the same time, Catalonia has been receiving vast numbers of Latin American migrants who already speak Spanish, one of the official languages of the region, but not the other, Catalan. This article will examine the conflicting pressures experienced by those migrants both in the labor market and in their communities.
Autorreferencia y estilo terapéutico: su intersección en la formación de terapeutas sistémicos
Garzón,Dora Isabel;
Diversitas: Perspectivas en Psicología , 2008,
Abstract: this paper refers the mode how in the auto-reference and therapeutic style seminary of the magister in psychology and the family program in the santo tomas university, contribute to the therapist education in a systemic paradigm, through a life experience that refers to "self" in its intersubjective dimension. it is made through complex human interchanges contextualized within psico-social-anthropological relational dynamics which give frame to conversational, reflective and metaobservation processes, in the emergency of meanings directly associate to the knowledge in the formation and in the therapy. the final aim is to construct a knowledge that is put to the service of the transformation of the human suffering through therapist as a conscious manager of the change from an ethical position. in this way is insisted on the experiential components required by the psychotherapists to make its transit towards the second order epistemology proposed by von foerster through an exercise based on the self-reference.
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